Multiplying and Dividing Real Numbers

This video tutorial covers practice problems involving multiplication and division, focusing on handling positive and negative numbers. It explains the rules for multiplying and dividing numbers with different signs, and delves into the complexities of exponents, particularly when dealing with negative numbers and parentheses. The tutorial also addresses division of fractions and provides a real-world application involving temperature calculations.

What should you pay extra attention to in this lesson?

• Exponents

• Subtraction

• Addition

• Geometry

What is the result of 9 times -0.8?

• -72

• 7.2

• -7.2

• 72

If you multiply two numbers with the same sign, the result is always:

• Zero

• Positive

• Undefined

• Negative

What is the result of (-4)³?

• -16

• 16

• -64

• 64

When raising a negative number in parentheses to an even exponent, the result is:

• Undefined

• Zero

• Always positive

• Always negative

What is the result of 5⁴ when the negative sign is outside the parentheses?

• 625

• -3125

• -625

• 3125

What is the result of -1/5 divided by -7?

• -15

• 1/35

• 15

• -1/35

What is the result of 63.9 divided by -3?

• -21.3

• 21.3

• 20.3

• -20.3

When dividing fractions, what should you do with the second fraction?

• Square it

• Subtract it

• Add it

• Invert it

What was the temperature in Bethel, Alaska, if it was twice as cold as -24°F?

• -48°F

• 12°F

• 48°F

• -12°F